21000279740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{307}}^1\times {\mathrm{310931}}^1$

素因数の和:311258

約数の個数: 48

約数和(自身を含む): 48266596224

約数和(自身を除く): 27266316484

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 307, 614, 1228, 1535, 3070, 3377, 6140, 6754, 13508, 16885, 33770, 67540, 310931, 621862, 1243724, 1554655, 3109310, 3420241, 6218620, 6840482, 13680964, 17101205, 34202410, 68404820, 95455817, 190911634, 381823268, 477279085, 954558170, 1050013987, 1909116340, 2100027974, 4200055948, 5250069935, 10500139870, 21000279740]

約数ペア:

[(1, 21000279740), (2, 10500139870), (4, 5250069935), (5, 4200055948), (10, 2100027974), (11, 1909116340), (20, 1050013987), (22, 954558170), (44, 477279085), (55, 381823268), (110, 190911634), (220, 95455817), (307, 68404820), (614, 34202410), (1228, 17101205), (1535, 13680964), (3070, 6840482), (3377, 6218620), (6140, 3420241), (6754, 3109310), (13508, 1554655), (16885, 1243724), (33770, 621862), (67540, 310931)]